Karst is a term that was first applied to a plateau in the Dinaric Alps of Yugoslavia. It has now come to be applied to similar regions throughout the world. Such regions are characterized by the presence of limestone or other soluble rocks, where drainage has been largely diverted into subterranean routes. The topography of such areas is dominated by sinkholes, sinking streams, large springs, and caves.

Unfortunately, many karst features are subject to incompatible or damaging uses. Most are on private land, often with owners apathetic to their preservation or unaware of their significance. Protection and awareness of karst features is what the Indiana Karst Conservancy is all about.

More information on karst in Indiana.

Indiana Karst Areas: The yellow area is a karst region associated with limestones of the Mississippian age, laid down 320-360 million years ago. The green consists of older Devonian and Silurian limestones.